Improvement in geates



A. PALMER.

.Grate.

Patented Nov; 5, 1867.

CrmssJ Fig.6? mz goiter tans gaunt @ffirr.

.- PETER A. PALMER, 0 F TROY, NEW YORK.

I Letters Patent No. 70,462, dated November 5, 1867.

IMPROVEMENT IN GEAI'ES.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, PETER A. PALMER, of the city of Troy, in the county of Rensselacr, and State of New York, have invented a new and useful Improvement in Grates for burning coal on; and I do hereby declare that the following is afull and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Figure 1 shows an end view of grate and frame together.

Figure Q-is a face view or plan of grate-frame, cross-bars, and agitator.

Figure 3 shows a suspended or agitating-bar, E.

Figure 4 shows a sustaining-bar.

Figurc5, a cross-section of grate and frame at O O. V

Figure 6 shows a section of bed-plate and bar.

Figure 7 shows the sustaining and rolling shaft 0.

The bed-plate A (see fig. 2) has a fiat horizontal border, which is a bed for the brick which surround the fire-chamber. But in the use of my gratcI do not wish to be confined to this particular kind of bed-plate, as it may be adapted to others, or any kind of bearing on which the cross-bars B canrest. In two sides of said bed-plate A are slots or recesses at suitable distances apart, into which the two ends of the alternate stationary bars B are fitted, said bars reaching entirely across the open space of bed-plate, and resting at each end in the slots in the bed-plate, as shown in fig. 4. These cross-bars, instead of being removable, may be cast solid to said bed-plate, but I prefer making them detachable, for theeconomy and convenience of replacing one or more of'them, in case any of them should fail before the whole grate is burned out. The shaft C extends from one end of the frame or bed A to the other, with one end extendin ubeyond, to receive the handle D. Said shaft is supported at each end by the bed-plate, while the intervening portion rests on the centre of the alternate and supporting bars B, a half-circling notch being cut out of each to receive it, as shown at G in fig. 4. The alternate bars E are attached by their centres to the shaft 0, (see fig. 3,) and by it are suspended in the alternate spaces between the bars 13. The bars E are tapered from their centres to each end, to equalize their strength, and the supporting-bars B are correspondingly tapered from each end to their centres, to equalize the spaces or openings between the two, 13 and E. The'bars E reach nearly from side to side of the space in frame A, as shown in fig. 3. The centre of the grate on which the shaft 0 rests is slightly raised, making a decline each way from the centre, so that in agitating the fire either end of the bars Eshould not be turned up much, if any,,morc

than to a level. This movement does not tend to throw the body of coal to the centre, and there pack it, (as is the I case with most other grates but has the eil'cct to loosen up the fuel, so as to receive more readily fresh oxygen to start up the combustion, and this is done from one extreme. the fire-box to the other at the same time. The shaft C is prevented from sagging by its several bearings: supporting and alternate cross-bars B. It will be seen that the bars B are important, not only as dividing i the bottom space, but, in extending clear across,

resting each end on the bed-plate, they become supporters for the -other bars E by their sustaining the shaft U, to which the bars E are connected, and for this purpose the bars B may be made suflicicntly strong to bear almost any weight. It will also be seen that while the fire is so easily freed from ashes, yet, when it may be necessary to clear the fire-box entirely, it may be done by turning the bars E in a perpendicular position, which will leave ample spaces for the discharge of its contents into the ash-pit below.

Two points are important in a grate: first, that it should work perfectly, and, second, that it should he I durable, and these two points in the arrangement and construction of my grates are most successfully obtained;

therefore- What I claim as new and novel, and desire to secure by Letters Patent, is The alternate stationary bars B, in combination with the shaft 0, bars E, and frame A, or their equivalents, as and for the purposes herein set forth.

- P. A. PALMER.

Witnesses:

H. G. GILES, Geo. W. LAMB 

